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PRODUCT MODULE 01 / 06

Physical Dimensions

Automatic mm / inch conversion · Core engineering specifications

Data source: Structured from factory data; final measured values prevail.

Overall dimensions (W × D × H)	590 × 640 × 1060 mm
Backrest inner width	460 mm
Backrest height	570 mm
Seat width	510 mm
Seat depth	440 mm
Maximum adjustable seat height	510 mm
Minimum adjustable seat height	410 mm
Armrest height above seat	180 mm
Five-star base span diameter	640 mm
Maximum total armrest height from floor	700 mm
Finished Seat Cushion Thickness	90 mm
Backrest Padding Thickness	70 mm
Lumbar Support Zone Height	240 mm
Clear Width Between Armrests	540 mm

PRODUCT MODULE 02 / 06

Weight, Load & Performance

Net weight / load capacity / users / durability

Data source: Product performance data; verify exact test conditions before procurement.

Net weight per unit	19 kg
Recommended static user load capacity	136 kg
Seat cushion foam density	40 kg/m³
Caster rolling durability cycle count	40000 cycles
Gas lift static load rating	150 kg
Base static load test threshold	1136 kg
Backrest mesh abrasion resistance	50000 cycles
Seat Foam Density / Rebound Reference	45 kg/m³ / 65%
Back Foam Density Reference	38 kg/m³
Upholstery Thickness / Abrasion Reference	1.4 mm / 50000 cycles

PRODUCT MODULE 03 / 06

Materials & Structure

Core acceptance fields · Panels / hardware / frame / upholstery

Data source: Subject to the factory material list and inspection report.

Backrest construction	Tensioned polyester mesh over PP lumbar support frame
Seat cushion padding	50mm thick high-resilience cold-cure molded foam
Seat upholstery	Wear-resistant polyester fabric seat cover
Armrest construction	Integrated fixed loop PP armrests connected to back frame
Frame and chassis	2mm thick steel tilt mechanism under seat with PP outer back shell
Gas lift cylinder	100mm stroke Class 3 black painted steel pneumatic cylinder
Five-star base	Glass-fiber reinforced nylon five-prong caster base
Caster construction	60mm diameter dual-wheel PU soft tread casters
Seat support plate	12mm thick MDF inner seat support board
Seat Internal Support Board Thickness	14 mm bent plywood or equivalent support board
Backrest Internal Frame Thickness	14 mm bent plywood/composite reinforced frame
Tilt Mechanism Plate Thickness	2.5 mm cold-rolled steel

PRODUCT MODULE 04 / 06

Functions & Adjustment

Adjustment / rotation / tilt / mobility / storage features

Data source: Functional configuration; the supplier specification prevails.

Seat height adjustment	100mm vertical travel via pneumatic gas lift, lever-operated under seat
Swivel function	360-degree smooth full rotation around central gas lift axis
Tilt function	12-degree backward synchro tilt with user weight tension adjustment
Mobility function	Dual-wheel PU casters for smooth rolling on hard and carpeted floors
Lumbar support	Fixed ergonomic shaped lumbar support zone integrated into mesh back
Recline Angle / Lock Reference	125° with 3suggested lock positions
Tilt Tension User-weight Range	Reference adjustment coverage 120 kg
Rotation / Mobility Configuration	360° swivel with 5-caster multidirectional movement

PRODUCT MODULE 05 / 06

Packaging & Logistics

Verified carton / gross weight / assembly / loading data

Data source: Reference for export quotations and container planning.

Reference Package Count	1 set / 2 cartons
Reference Assembly Time	40 minutes per set
Reference Carton Dimensions	850× 420× 720 mm
Reference Packaged Gross Weight	23 kg/set
Reference Carton Volume	0.26 m³/set
Indicative 20GP Loading	135 sets at 85% space utilization
Indicative 40HQ Loading	320 sets at 85% space utilization

PRODUCT MODULE 06 / 06

Applications & Usage

Recommended spaces / users / usage modes

Data source: Recommended applications based on product form and category.

Open plan office workstations	Suitable for 8 hour daily individual desk work with ergonomic lumbar support
Home office spaces	Compact footprint fits standard home desk sizes for remote working use
Meeting room auxiliary seating	Suitable for short to medium duration seating in small conference spaces
Shared hot-desking environments	Durable construction supports multi-user rotating use in flexible offices
Administrative staff workstations	Fixed armrests and easy mobility suit administrative task work requirements
College library study spaces	Quiet rolling casters and breathable back suit long-duration study use
Recommended Matching Desk Size	2.4 m executive desk
Reference Daily Use Duration	8 hours/day; confirm by ergonomic testing

STANDARD S1

EU Market Entry Requirements * EN Standards

EU Market Access Requirements* EN Standards

EN 1335-1:2020	Applicable to office task chair dimensional, safety and strength performance requirements
EN 1335-2:2018	Applicable to office chair mechanical safety test methods for procurement verification
EN 1335-3:2009	Applicable to office chair structural stability and durability test criteria

STANDARD S2

North America Purchasing & Inspection Reference * ANSI/BIFMA Standards

US and Canada office-furniture standards

ANSI/BIFMA X5.1-2017	Applicable to general-purpose office chairs safety and performance test standards

STANDARD S3

Standards Applicable to China-Market Projects * GB Standards

Standards applicable to China-market projects

GB/T 35607-2017	Applicable to office chair stability, strength and durability testing for procurement acceptance
GB/T 3324-2017	Applicable to general furniture dimensional tolerance and finish quality requirements

Standardized tender description text

This product must meet the following technical requirements:
1. GB/T 35607-2017: Applicable to office chair stability, strength and durability testing for procurement acceptance;
2. GB/T 3324-2017: Applicable to general furniture dimensional tolerance and finish quality requirements;
Final delivery parameters, test reports, and acceptance criteria are subject to the purchase contract.

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Product Description

The Mid-back Ergonomic Mesh Office Task Chair with Fixed Loop Armrests, model MTSH-MB-590GY, is a versatile unbranded seating solution designed for consistent daily use across commercial and residential settings. Its streamlined visual profile pairs a contoured mesh back with a neatly upholstered seat, supported by a sleek five-star base that balances a compact footprint with stable structural presence. Fixed loop armrests connect directly to the back frame, creating a cohesive, uncluttered silhouette that fits seamlessly into a range of interior schemes without excess decorative detailing.
Constructed for enduring performance, the chair features a tensioned polyester mesh backrest set over a PP lumbar support frame, paired with a 50mm thick high-resilience cold-cure molded foam seat wrapped in wear-resistant polyester fabric. Its structural core includes a 2mm thick steel tilt mechanism housed beneath a PP outer back shell, supported by a glass-fiber reinforced nylon five-prong base fitted with 60mm diameter dual-wheel PU soft tread casters. A Class 3 black painted steel pneumatic cylinder facilitates height adjustment, while a 12mm thick MDF board forms the internal seat support structure.
Functional design elements prioritize user comfort across extended use. The chair offers lever-operated seat height adjustment with 100mm of vertical travel, 360-degree smooth swivel rotation, and a 12-degree backward synchro tilt with user weight tension adjustment, plus three lock positions for a 125-degree recline. An integrated fixed ergonomic lumbar support zone aligns with the natural curve of the lower back, and the soft dual-wheel casters roll smoothly across both hard flooring and carpeted surfaces. The breathable mesh backrest supports airflow to reduce heat buildup during prolonged sitting.
This chair is well-suited for open plan office workstations supporting eight hours of daily individual desk work, compact home office spaces paired with standard desk sizes, and short to medium duration use in small meeting rooms. It also holds up to rotating multi-user use in shared hot-desking environments, suits the mobility needs of administrative staff workstations, and fits quiet, extended study use in college library spaces.
Procurement teams should note that each unit ships across two cartons, with an assembly time of 40 minutes per set. The chair supports a recommended static user load capacity aligned with its component ratings, and its durable material construction is engineered to withstand frequent, repeated use in high-traffic shared spaces. Order volume planning can reference standard 20GP container loading figures for efficient bulk shipping coordination.

Mid-back Ergonomic Mesh Office Task Chair with Fixed Loop Armrests Specifications

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